Answer:
He created a strong professional army and paid the soldiers well.
He expanded the boundaries of the empire, making the regions in the center of the empire secure from invasion.
He built a network of roads that improved trade and made it easier for Roman armies to move where they were needed.
He started police patrols and firefighting squads to protect the city of Rome.
He improved the image of the government in the eyes of the common people, making them less likely to rebel.
Step-by-step explanation:
This is the exact answer, so you might want to change a few words.